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Cost of Septic Tank Excavation in Seattle

Septic tank excavation is a critical process for homeowners and businesses in Seattle, WA, looking to install, replace, or maintain their septic systems. Understanding the costs involved can help you budget effectively and ensure that your septic system operates efficiently for years to come.

Factors Affecting Cost

  • Soil Type: Different soil types can impact the difficulty and duration of excavation.
  • Tank Size: Larger tanks require more extensive excavation, increasing costs.
  • Depth of Excavation: Deeper excavations are more labor-intensive and costly.
  • Accessibility: Hard-to-reach areas may require special equipment, adding to the expense.
  • Permits and Inspections: Local regulations often require permits and inspections, which add to the overall cost.
  • Labor Rates: Labor costs in Seattle can vary, influencing the total excavation expense.
  • Disposal of Excavated Material: The cost to remove and dispose of soil and debris can affect the overall price.

Average Costs for

Task Average Cost (Seattle, WA)
Septic Tank Installation $3,000 - $10,000
Excavation per Hour $100 - $150
Soil Testing $1,000 - $2,000
Permit Fees $200 - $500
Inspection Fees $100 - $300
Removal of Old Tank $1,000 - $3,000
Gravel and Backfill $500 - $1,500

Septic Tank Excavation